Katja Fleming has given up her job as an actress and married the business man Robert Fleming. But the cold that surrounds her in her modern, luxurious high-rise makes her lonely. Then she meets the author John Lawrence, who wants to convince her to perform in his new play.
Klaus murders women. After killing another girl, Klaus is spotted by his friend Kersten as he leaves his latest victim's house. Kersten gives him a ride and Klaus begins to plot the man's death. He's a witness, after all. Nobody else can say Klaus was there except Kersten. They decide to head to a party. Klaus' unhappy wife is there. So are a bunch of other people. Killing Kersten will be difficult. Then they all play a game called... Murder Party!
